Articulator



Aug. 12, 1924.;` 1,504,906

C. RUMPEL. ET AL ARTICULATOR Fild May 14 1923 2 Sheets-Shet 2 Patented Aug. 12, 1924.

UNITED STATES PATENT orifice.

CARL RUMIPEL, OF BERLN, AND HERMANN SCHRDER, OF VBIERIITI'WESTE-1\`I'D, GER- MANY, ASSIGNORS TO THE O'F SOMMER RUNGE, DE BERLIN-FRIEDENAU,

GERMANY.

AnTicULnroB..

To all whom t may concern:

Be it lrnown that we, Dr. CARL RUMPEL and Professor Dr. HERMANN' SCHRDER, citizens of the Republic of Germany, residing `at Berlin, and Berlinestend, Gein many, respectively, have invented new and useful, Improvements in Articulators, of which the following is a specification.

Thisinvention relates to improvements in the .iiticulator, a device employed in the dentistry for 7the production of artificial sets of teeth. j

By means of the articulator it is attained to move the jawsmodels of the patient against one another in the same way as the patient is Aused to do it when chewing. For this purpose firstly the chewing-moulds are obtained with the patient in known manner by the patients Vchewing-motion. These` chewing-moulds consist of Va suitable waxmass in which latter on performing the chewing-motion curved grooves are produced in the one of the wax-moulds by YIneans of pins arranged in the other of the moulds.

The subject of the invention consists in the device of turnably arranged bearingor guide-cases for the two ends of the articulator-axis so that the llatter by the help of the chewingmoulds mentioned afore, which are placed into the articulator, is automatically moved by means of merely shifting the chewing-moulds one against the `other along the curved 'guide-grooves in such manner as the virtual jaw-axis of the patient was moved when producing the wax-moulds, and whereby at the same time a guide-curvecorresponding with the curves `of the wax- Vmould is obtained for the .adjustment-pin, for the purposeof avoiding `in this way the measurements on the patient hitherto necessary for lthe adjustment of the articulatoraxis, assuch measurements can be executed with difficulty only and mostly lead to an inexact result. y l

A further subject of the invention consists in the arrangement of devices by means of which each of the two` bearing-v or guiding-cases of the articulator-axis can be iixed 50 in any desired position;

Another subject of the invention consists in the arrangement of a turnable and fixable block within each of the two bearing-cases of the articulator-axis.

A still further subject of the invention consists in the arrangement of a4V pair of springy levers acting upon each of the ends of the articulator-axis at each of the two bearing-cases of the articulator-axis.

The drawing shows one form of. carrying out the articulator with the aforesaid improvements.

Fig. 1 is a perspective view of 'the articulator. In the right-hand bearing-case the top-*plate is omitted.

Fig. 2 is a vertical longitudinal section through one of the vbearingor guiding. cases ofthe articulator-axis and the bearing appertaining thereto.

Fig. 3 is a vertical cross-section on the line A-B of Fig. 2.

Fig. 4 is a view of one of the bearing-cases of the articulator-axis with the bearing appprtaining thereto and the top-plate taken O Fig. 5 is a view of the bearing-case with the top-plate taken off and with displaced block.

Fig. 6 is a view upon the front-plate of one of the -bearing-cases for the articulatoraxis. Y

. Fig. 7 is a like view with the bearing-case placed in oblique position.

VFig. 8 -is a vertical cross-section through the bearing-case Aaccording to .C-D inFig. L

t. This figure shows Kthe vpair of springy levers provided at the inner side of the topplate of the bearing-case. Y

Fig.A 9 is an upper view of the articulatoraxis with the arm fastened thereupon, the latter carrying the .adjustment-pin, and .the two bearingcases of the articulator-axis. Thefront plates of the bearing-cases are shown in sectional representation. The dottedlines show theVarticulator-axis with the armr in a slightly turned position.

Fig. 10 is a like view as Fig. 9, but the articulator-axis is illustrated by dotted lines in a turned and simultaneously laterally displaced position and the bearing-cases as well as the blocks coming in contact with the'ends of the articulator-axis are fixed in the position that corresponds with the respective position of the articulator-axis. Figs. 9 and 10 are drawn in a somewhat reduced scale. Y

Upon the articulator-axis 1 the arm 8 carrying the adjustment-pin 2 is fastened. The

two ends of the articulator-axis are guided in the front-plates 4 of a semi-circular bearing-case 5, which is fastened on a pivot 6.

This pivot is, by means of ball-bearing T, positioned in a box 9 fastened on the stand 8 of the articulator and on account of the ball-bearing the pivot 6 is easily turnable. In the middle, the pivot 6 is surrounded by i a ring 10 which however does not wholly span the pivot. By means of Va screw 11 the ring 10 is secured against being turned.

By way of a squeezingscrew 12 inserted. into the box' 9 lfrom above, the ring 10 can be pressed firmly on the pivot 6 and thereby the pivot 6 can be made steadfast with the bearingca`se 45 in the desired position.

The bearing-case 5 consists of the semicircular wall-part 13 with bottom-plate 14, top-plate 15 and front-plate 4, the wall-part 13 beingA fastened to the pivot 6. In the front-platee: an' angular slit 16 is arranged,

in which' the end of the Yarticulator-axis is guided. In the bearing-case a semi-circular block 17 is positioned'by means of the rpivots v18, 18 and can be turned round its middle-axis. The block 17 .is provided with n a handle 19 projecting through a circular slit 20 in the top-plate 15 ofv the bearingcase.

YIn 'the top-plate 15 a squeezing-screw 21 (FigL'1) is arranged which when being turned will teuch with its point upon the plate22 vprovided onY the block 17 and bv means of this squeezingscrew the block isV held in the required position.

At the'l inner side of the front-plate 4 two leversk211V are Varranged Vconnected together by way rof a spring 23. These levers are pressed by the springagainst a pin 25 fastended in the plate L1.1Each of the two ends f of the articulator-axis projects through the slitV l'between the two levers 24 up to the their. middle-axis,.l

front-plate of the block 17, as shown in Figi).l In the zero position theA ends of the axis are in contact with the blocks 17 in The spring 23 always "tends to bring about astriking of the pair i shaped 'like' a plug, a casing 27 is displace- YVablecarrying a right angular plate 28 being inclined .atv about 30 Vdegrees Ytowards the horizontal-plane.` Thepadjustment pin 2 is Y y di,sp1aceableinits longitudinal directionon the arm'13.' Inthe zero-position of the apparatus the adjustment pin 2 rests with its point in the middle of the plate 28.

The mode of employing the articulator and the operation of the same are the following.

At first the one of the chewingmoulds obtained with the patient in known manner by the patients chewing-motion is fastened to the ground-plate 26, the other to the arm 3, and in the plate 28 soft amalgam is carried in. Hereupon the arm 3 with the chewing-mould fastened thereto is moved in such manner along marked guide-grooves over the chewing-mould fastened to the ground plate 26, as the virtual jaw-axis of the patient would be motioned to the right and to the left on his chewing. Thereby the pin 2 engraves a precise curve into the amalgam. Under the influence of the articulatoraxis 1 moved by means of the arm 3, the bearing-cases 5, the blocks 17 and the pair of springy levers 24e, 24s are brought in acertain position. By means of strong turning the screws 12 and 21, the bearing-cases and the blocks 17 are fixed'in this position and thereby the articulator-axis 1 is given exactly that possibility of motionwhich is proper to the virtual jaw-axis of the respective patient.

Hereupon the chewing moulds are removed from the arm 3 and the ground-plate 26, and the amalgam contained in the plate is allowed to grow stiff. With the aid of the guiding-curve engraved in the stifened amalgam the individual motion-curves of the jaw can now be reproduced even without the chewing-mould by means of guiding the pin 2 along the. curve in the stiened amalgam. In this way an expedient has been obtained which, by placing the two parts of the artificial sets of teeth in the articulator, offers the possibility of an exact cont-rol until the working of the artificial sets of teeth has become so perfect that the` teeth afford an exact operationin all jawmotions which may unconsciously arise.

We claim:

1. In an articulator the combination of the articulator-axis with the bearingor guide-cases for the ends of the articulatoraxis, turnably positioned pivots fastened to the bearing-cases, and squeezing-screws for the fixation of the pivots.

2. In an articulator the combination of the articulator-axis with the bearingor guide-cases for the ends of the articulatoraxis, turnably positioned pivots fastened to ,the bearing-cases, screws for the fixation of the articulator-axis with turnably positioned and fixable bearing-cases for the ends of the articulatonaxis, an angular slit in the front-plate of each of the bearing-cases, a pair of levers turnably positioned at the front-plate, a pin fastened to the frontplate, and a spring pulling the levers against the pine 4. In an artioulator the combina-tion of the artioulat'or-axis With turnably positioned and xable bearing-eases, in the bearingcases turnably positioned and xable blocks and anarm fastened upon the articulatoi`- axis provided with a displaceable adjustment-pin.

5. In an articulator theV combination of the artioulator-axis with turnably positioned sind iixehle bearing-eases, in the bearingceses turnably positioned and xable blocks,

an arm fastened upon the artioulator-axis 15 with zi displaoeable adjustment pin and e ground-plate with a supporting-platte for the adjustment-pin displaoeable on the supporting-plate.

In testimony whereof We have signed our 20 names to this specification in the presence of two subscribing -rWitnesses.

Dr. CARL RUMPEL. Professor Dr. HERMANN SCHRDER. Witnesses:

E. HOLGERMAN, PAUL E. BRAUN. 

